A 22kW EV charger install in Sydney typically costs more than a 7kW unit — but the power rating isn’t what actually swings the price. The real cost driver is how far your switchboard sits from where the charger will be mounted, and whether you already have three-phase power at the board. We install 22kW chargers across the Hills and Hawkesbury district, and the two jobs below — both the same charger, same brand — show exactly how much that layout matters.
Why Charger Power Rating Gets Blamed for Cost, But Layout Is the Real Driver
Most advice on EV charger pricing focuses on kW rating: a 7kW charger costs less than a 22kW charger because it draws less power and needs lighter cabling. That’s true as far as it goes, but it misses the variable that actually moves the quote the most on a like-for-like charger: the physical relationship between your switchboard and your garage or driveway.
We recently installed a BMW Gen 3 Wallbox — a 22kW unit — for a homeowner in North Kellyville. The switchboard sat back-to-board with the garage wall where the charger was mounted, and the property already had three-phase supply at the board. That meant a short, direct circuit run: no wall chasing, no cable draw through ceiling space, no additional switchboard work. It was a same-day install, completed the day after the customer collected the charger.
Compare that to the more common scenario: switchboard on the opposite side of the house, cable needing to run through ceiling space or external conduit to reach the garage. On an otherwise identical 22kW install, that layout adds roughly two hours of additional labour and can bring the total job to around double the price of a straightforward install like the North Kellyville job.
Same charger. Same power rating. Same brand. Double the price — purely because of where the switchboard sits.
The Two Things to Check Before You Get a Quote
If you’re planning a 22kW EV charger install, these are the two questions that will tell you more about your likely cost than the charger spec sheet will:
- Do you have three-phase power at the switchboard? A 22kW charger needs three-phase supply. If your property is single-phase only, that’s an upgrade before the charger install even begins — a separate cost most quotes don’t lead with.
- How far is the switchboard from where the charger will be mounted? A back-to-back layout (switchboard and charger on the same wall, or directly opposite) means a short, direct circuit run. A long run — especially through ceiling space, brick, or external conduit — adds both labour hours and materials.
Both of these can usually be assessed from a couple of photos before a formal quote, which is worth asking for upfront rather than waiting for a site visit to find out your job falls into the “complex run” category.
What This Means If You’re Comparing Quotes
If you’re getting EV charger quotes from multiple electricians and the prices vary significantly for what looks like the same charger, layout is the most likely explanation — not one electrician padding the job and another lowballing it. Ask each quote to specify the cable run distance and whether any switchboard upgrade is included. A quote that doesn’t mention either of these hasn’t actually assessed your property’s layout yet.
Frequently Asked Questions
Why do EV charger installation quotes vary so much for the same charger?
The switchboard-to-garage cable run and whether the property already has three-phase power are the two biggest cost variables — not the charger’s brand or power rating. A short, direct run with existing three-phase supply can cost roughly half as much as a long or obstructed run on an identical charger.
Do I need three-phase power for a 22kW EV charger?
Yes. A 22kW charger requires three-phase supply. If a property only has single-phase power, a supply upgrade is needed before the 22kW charger can be installed, which adds to the overall cost and timeline.
How much extra does a complex cable run add to an EV charger install?
Based on real Hills District jobs, a complex run — switchboard on the opposite side of the house, cable through ceiling space or conduit — adds roughly two hours of additional labour compared to a straightforward, direct run, and can bring the total cost to around double.
Saunders Electrical Group installs EV chargers across the Hills District and Hawkesbury region, including Castle Hill, Kenthurst, North Kellyville, Rouse Hill, Baulkham Hills, and surrounding suburbs. Read more about our EV charger installation process or view EV charger costs in West Pennant Hills for a comparison. If your switchboard capacity is in question, our switchboard upgrade page covers what’s involved.
Electrical Contractor Licence 344815C.